Custom Product Engineering – A Case Study

Here’s a step-by-step account of how PTI’s Engineering Team worked with an OEM to customize an existing housing for a new application…all in just over two months:

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The Background: A large, US-based OEM (Original Equipment Manufacturer) supplies drying equipment for commercial use. Their products include machines such as industrial grade large capacity dryers, coin operated dryers, and drying equipment.

The Challenge: The OEM discovered the bearings of their drive motors were overloaded and prone to premature failure. While needing a very light swivel fit for the bearing within the housing during installation, the customer also wanted the ability to lock the bearing down in the housing after motor and drive components were aligned and adjusted. Ultimately, they wanted a new adjustable clamp type housing.

The Solution: PTI’s Engineering Team worked with the customer to understand and analyze the application needs.

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The Result: This new housing allowed all drive components to be aligned and installed first, then the bearings could be clamped into position. Due to the lube-for-life feature desired by the customer, PTI recommended a 60% lube fill to allow as much lube for the best possible service life.

The project length from initial contact to completed production units took less than three months.

PTI’s Ability: By utilizing PTI’s engineering capabilities, customers benefit from dedicated, knowledgeable, and creative problem solving even under very compressed time frames. PTI remains committed to cutting-edge engineering capabilities and top-notch customer service.

Click here to view the PDF version of this case study.

Do you need help improving an existing or creating a new application? Contact us to find out how our engineers can help.

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About PTI: Upon opening in 1994, PTI has specialized in serving the growing niche market of Metric products. As demand has increased over the years, so has our product offering. Today, our customers enjoy a huge offering of both Metric and Inch-based products for the Industrial Power Transmission Industry.

Want to learn more about PTI? Click here to view our company overview video. Check out other videos, product information and more at www.ptintl.com.

The Four Shaft Attachment Methods

PTI proudly offers all four insert types for mounted ball bearings: Setscrew Locking, Eccentric Locking Collar, Concentric Clamp Collar and Tapered Adapter Sleeve. Understanding the features of each and the differences between them will help ensure you’re using the best shaft attachment method for your application.

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SETSCREW LOCKING
How it works: Two screws are tightened to clamp the bearing onto the shaft. The contact between the bearing and the shaft is concentrated on the opposite side of the setscrews. This is the most popular mounting method.
Note: Setscrews can cause significant fretting corrosion, making removal very difficult after years of operation.

ECCENTRIC LOCKING COLLAR
How it works: As the collar is twisted into place, it locks the bearing to the shaft. The contact of the bearing is slightly more distributed than the setscrew locking method.
Note: These are unidirectional and are not intended for reversing loads. Like the setscrew method, the eccentric locking collar can cause significant fretting corrosion, making removal very difficult after years of operation.

CONCENTRIC CLAMP COLLAR
How it works: Tangs on the extended inner ring of the bearing lock down when the collar is twisted into place. The contact of the bearing is evenly distributed within a small area around the shaft.
Note: This is a good method to use to minimize vibration.

TAPERED ADAPTER SLEEVE
How it works:
This bearing has a tapered adapter, a locking washer, and a locking nut. As the locking nut is tightened with a spanner wrench, the adapter is drawn through the bearing and tightened to the shaft. The contact of the bearing is evenly distributed around the shaft.
Note: This bearing has the highest purchase price and will take the longest to install, but allows for minimal shaft damage and highest possible speeds with the least amount of vibration.

Click here for a video detailing the installation process and proper bearing maintenance.

* * *

About PTI: Upon opening in 1994, PTI has specialized in serving the growing niche market of Metric products. As demand has increased over the years, so has our product offering. Today, our customers enjoy a huge offering of both Metric and Inch-based products for the Industrial Power Transmission Industry.

Want to learn more about PTI? Click here to view our company overview video. Check out other videos, information and more at www.ptintl.com.